Vehicular Ad Hoc Network (VANET) provides services to vehicles on the road. While moving on road it is possible that some intruder can enter into network and hinder the normal operation of the VANET network. One of the prominent services is to assure security of vehicles from attacks incurred due to these intruders. Therefore, an authentication mechanism is required that will restrict the entry of malicious nodes in the network. Number of authentication protocols is being used in VANET such as Digital Certificate Authentication (DCA), Pairing, and Intermediary Re-encryption (IRE), and many more. From the existing ones, IRE works well in terms of preventing attacks from unauthorized users in the network. Still IRE is susceptible to attacks like eavesdropping, denial of service attack, masquerading. To overcome the above stated attacks an Enhanced Intermediary Re-encryption (EIRE) method for authentication is proposed in this paper. The improved EIRE algorithm will reduce overhead packets in the network and hence will reduce delay, jitter, and increases throughput and packet delivery ratio by removing attacks from the network.
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Malik et al. (2016) studied this question.